155233022857281 has 24 divisors (see below), whose sum is σ = 224871528609000. Its totient is φ = 103190669275392.

The previous prime is 155233022857279. The next prime is 155233022857313. The reversal of 155233022857281 is 182758220332551.

155233022857281 is a `hidden beast` number, since 1 + 5 + 5 + 2 + 3 + 302 + 2 + 8 + 57 + 281 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14798293391025 + 140434729466256 = 3846855^2 + 11850516^2 .

It is not a de Polignac number, because 155233022857281 - 2¹ = 155233022857279 is a prime.

It is a super-2 number, since 2×155233022857281² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155233022857681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4438885 + ... + 18170573.

It is an arithmetic number, because the mean of its divisors is an integer number (9369647025375).

Almost surely, 2^{155233022857281} is an apocalyptic number.

It is an amenable number.

155233022857281 is a deficient number, since it is larger than the sum of its proper divisors (69638505751719).

155233022857281 is a wasteful number, since it uses less digits than its factorization.

155233022857281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13735313 (or 13735310 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 155233022857281 in words is "one hundred fifty-five trillion, two hundred thirty-three billion, twenty-two million, eight hundred fifty-seven thousand, two hundred eighty-one".